Structural concept design of the Bunsen reactor and sulphuric acid decomposer of the HTTR-IS hydrogen production system

Since nuclear hydrogen production system should be economically competitive compared with other hydrogen production methods, it is important to reduce the construction cost of the IS process hydrogen production plant. Japan Atomic Energy Agency (JAEA) has started the conceptual design study of components in the IS process hydrogen production system to be connected with the HTTR (HTTR-IS system). This paper describes the additional proposal for the mixer-Settler type Bunsen reactor and combined sulphuric acid decomposer of the HTTR-IS system which enhances their performance and enables reduction of fabrication cost. The enhancements of the mixing and separating performance in the Bunsen reactor using static mixers with microbubble and dams, and minimizing the size of the combined sulphuric acid decomposer by optimizing its flow path remarkably contribute to the size reduction of components. (author)